499989815 has 16 divisors (see below), whose sum is σ = 654326400. Its totient is φ = 364545792.

The previous prime is 499989803. The next prime is 499989827. The reversal of 499989815 is 518989994.

It is an interprime number because it is at equal distance from previous prime (499989803) and next prime (499989827).

It is not a de Polignac number, because 499989815 - 2⁴ = 499989799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43550 + ... + 53819.

It is an arithmetic number, because the mean of its divisors is an integer number (40895400).

Almost surely, 2^499989815 is an apocalyptic number.

499989815 is a deficient number, since it is larger than the sum of its proper divisors (154336585).

499989815 is a wasteful number, since it uses less digits than its factorization.

499989815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97466.

The product of its digits is 8398080, while the sum is 62.

The square root of 499989815 is about 22360.4520303146. The cubic root of 499989815 is about 793.6951367209.

The spelling of 499989815 in words is "four hundred ninety-nine million, nine hundred eighty-nine thousand, eight hundred fifteen".